Soliton trap in strained graphene nanoribbons
Soliton trap in strained graphene nanoribbons
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DOI：
10.1088/1367-2630/12/10/103015
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发表时间：
2010-07
影响因子：
3.3
通讯作者：
K. Sasaki;R. Saito;M. Dresselhaus;K. Wakabayashi;T. Enoki
中科院分区：
文献类型：
--
作者：
K. Sasaki;R. Saito;M. Dresselhaus;K. Wakabayashi;T. Enoki
无质量费米子的波函数由两个手性组成，左手性和右手性，它们是手性算子的本征态。基本粒子物理的弱相互作用理论关于两个手性不对称，这种对称破缺理论被称为手性规范理论。手性规范理论可以应用于石墨烯的无质量狄拉克粒子。在本文中，我们在石墨烯手性规范理论的框架内证明，在存在应变的情况下，石墨烯纳米带的边界附近存在拓扑孤子。该孤子是连接两个手性的零能量态，并且是传输赝自旋的基本激发。孤子应该可以通过扫描隧道显微镜实验来观察。
The wavefunction of a massless fermion consists of two chiralities, left handed and right handed, which are eigenstates of the chiral operator. The theory of weak interactions of elementary particle physics is not symmetric about the two chiralities, and such a symmetry-breaking theory is referred to as a chiral gauge theory. The chiral gauge theory can be applied to the massless Dirac particles of graphene. In this paper, we show within the framework of the chiral gauge theory for graphene that a topological soliton exists near the boundary of a graphene nanoribbon in the presence of a strain. This soliton is a zero-energy state connecting two chiralities and is an elementary excitation transporting a pseudo-spin. The soliton should be observable by means of a scanning tunneling microscopy experiment.